Chronic Bloating and Gas Every Day: Causes and Solutions

Why do some people have gas and bloating every single day?

Gas is a normal part of digestion — the gut naturally produces several hundred milliliters of gas daily through bacterial fermentation of undigested carbohydrates. What varies between people is:

1. How much gas is produced — driven by diet composition and gut microbiome 2. How efficiently gas is cleared — through belching, normal gut transit, and rectal passage 3. How sensitive the gut is to gas volume and distension — people with IBS and related conditions perceive normal amounts of gas as uncomfortable 1Ref 1Lacy BE, Pimentel M, Brenner DM, Chey WD, Keefer LA, Long MD, Moshiree B (2021).ACG Clinical Guideline: Management of Irritable Bowel Syndrome.IBS as a major cause of chronic bloating and gas; visceral hypersensitivity; low-FODMAP dietary approach

When daily bloating and gas is the complaint, all three of these levers are worth examining.

What are the most common causes of daily bloating and gas?

Irritable bowel syndrome (IBS) IBS is among the most common explanations for daily or near-daily GI symptoms. It involves altered gut motility and visceral hypersensitivity — the gut perceives and reacts to normal stimuli more intensely. Bloating and gas are among its most frequently reported symptoms, alongside abdominal cramping and changes in bowel habits 1Ref 1Lacy BE, Pimentel M, Brenner DM, Chey WD, Keefer LA, Long MD, Moshiree B (2021).ACG Clinical Guideline: Management of Irritable Bowel Syndrome.IBS as a major cause of chronic bloating and gas; visceral hypersensitivity; low-FODMAP dietary approach.

Dietary fermentable carbohydrates (FODMAPs) FODMAPs are short-chain carbohydrates — found in wheat, onions, garlic, apples, pears, lactose-containing dairy, and legumes — that are poorly absorbed in the small intestine and then rapidly fermented by colonic bacteria, producing gas and fluid shifts 1Ref 1Lacy BE, Pimentel M, Brenner DM, Chey WD, Keefer LA, Long MD, Moshiree B (2021).ACG Clinical Guideline: Management of Irritable Bowel Syndrome.IBS as a major cause of chronic bloating and gas; visceral hypersensitivity; low-FODMAP dietary approach.

Lactose intolerance The enzyme lactase, which digests milk sugar, declines with age in many adults. Undigested lactose passes to the colon where bacteria ferment it, causing gas, cramping, and loose stools 2Ref 2Moshiree B, Drossman D, Shaukat A (2023).AGA Clinical Practice Update on Evaluation and Management of Belching, Abdominal Bloating, and Distention: Expert Review.SIBO, aerophagia, lactose intolerance as causes of chronic bloating; evaluation and breath testing approaches.

Small intestinal bacterial overgrowth (SIBO) When bacteria that normally reside in the colon migrate or proliferate in the small intestine, they ferment food earlier in the GI tract, causing gas production that begins quickly after eating and is often severe 2Ref 2Moshiree B, Drossman D, Shaukat A (2023).AGA Clinical Practice Update on Evaluation and Management of Belching, Abdominal Bloating, and Distention: Expert Review.SIBO, aerophagia, lactose intolerance as causes of chronic bloating; evaluation and breath testing approaches.

Functional dyspepsia This condition involves upper GI symptoms — early satiety, bloating centered in the upper abdomen, and discomfort — without a structural cause. It is distinct from IBS but can coexist with it 3Ref 3Moayyedi P, Lacy BE, Andrews CN, Enns RA, Howden CW, Vakil N (2017).ACG and CAG Clinical Guideline: Management of Dyspepsia.Functional dyspepsia as a cause of upper abdominal bloating and early satiety.

Constipation Slow gut transit means food and gas remain in the colon longer, allowing more fermentation and buildup. Treating constipation often improves bloating significantly.

What helps reduce daily gas and bloating?

Track what you eat and when symptoms occur. A one-to-two-week food and symptom diary — noting what you ate, how much, at what time, and when bloating peaked — is the single most useful starting point. Patterns often reveal a specific food group or eating behavior driving symptoms.

Reduce high-FODMAP foods on a trial basis. Eliminating wheat, onions, garlic, lactose, stone fruits, legumes, and sweeteners like sorbitol for two to four weeks, then reintroducing them one category at a time, can identify specific triggers 1Ref 1Lacy BE, Pimentel M, Brenner DM, Chey WD, Keefer LA, Long MD, Moshiree B (2021).ACG Clinical Guideline: Management of Irritable Bowel Syndrome.IBS as a major cause of chronic bloating and gas; visceral hypersensitivity; low-FODMAP dietary approach. This is best done with a dietitian's guidance.

Eat more slowly and avoid swallowing air. Eating quickly, drinking through straws, and chewing gum all increase swallowed air. Slowing down meal pace and chewing with the mouth closed reduces aerophagia 2Ref 2Moshiree B, Drossman D, Shaukat A (2023).AGA Clinical Practice Update on Evaluation and Management of Belching, Abdominal Bloating, and Distention: Expert Review.SIBO, aerophagia, lactose intolerance as causes of chronic bloating; evaluation and breath testing approaches.

Address constipation. Increasing dietary fiber gradually (to avoid worsening gas initially), staying well-hydrated, and moving the body regularly supports regular bowel habits.

Over-the-counter options. Simethicone (Gas-X) helps gas pass more easily. Alpha-galactosidase (Beano) breaks down fermentable sugars in legumes before they reach the colon. These can help but don't address the underlying cause.

Probiotics. There is modest evidence that certain probiotic strains may reduce IBS-related bloating, though the effect size varies considerably by product and individual.

What tests does a gastroenterologist use to find the cause?

If dietary and lifestyle changes do not resolve symptoms after four to eight weeks, or if the symptom history suggests a specific diagnosis, a gastroenterologist may recommend:

• Hydrogen breath tests — for SIBO, lactose intolerance, or fructose malabsorption; the patient drinks a test sugar and breath hydrogen is measured over two to three hours
• Celiac disease serology — a blood test to screen for celiac disease, which can cause persistent GI symptoms including bloating 4Ref 4Rubio-Tapia A, Hill ID, Semrad C, Kelly CP, Greer KB, Limketkai BN, Lebwohl B (2023).American College of Gastroenterology Guidelines Update: Diagnosis and Management of Celiac Disease.Celiac disease testing as part of evaluation for unexplained chronic GI symptoms including bloating
• Colonoscopy or upper endoscopy — if there are features suggesting structural disease, inflammatory bowel disease, or cancer risk
• Gastric emptying study — if gastroparesis is suspected (early satiety, nausea, vomiting)

Cludia can help you find a gastroenterologist, organize your symptoms before the visit, and understand what tests to expect.